Which Oil to run in a Zero Turn Kawi Engine?

Discussion in 'Lawn Mowing' started by Angelski28, Mar 29, 2012.

  1. Angelski28

    Angelski28 LawnSite Member
    Messages: 29

    I am wondering what oil you guys think is best to run in a 24 HP Kawasaki engine. It sits on a bob-cat zero turn. Manual says 10w-30 but wondering if I should use synthetic or not. Let me know your thoughts. Cheers.
  2. mtmower

    mtmower LawnSite Bronze Member
    Messages: 1,111

    I run synthetic in everything. I usually bump up the viscosity rating one notch from conventional oil (ie. mobile one 15-40w synthetic, etc.). I also add a zink additive to each service since they pulled the zink from most all oils.
  3. Exact Rototilling

    Exact Rototilling LawnSite Fanatic
    Messages: 5,377

    If you use motorcycle specific oils it will have the old.SG and SJ ratings that have higher levels of zddp.
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  4. ashgrove landscaping

    ashgrove landscaping LawnSite Gold Member
    Messages: 3,529

    Try kawasaki oil. Its partial synthetic or something like that. Real good oil and half the price.
  5. mtmower

    mtmower LawnSite Bronze Member
    Messages: 1,111

    I'll have to look into this closer. The zddp or zink additive I found locally is $18 a bottle which does up to 6 qt. Which is ridiculous. Do they offer these in synthetic and what viscosities have you found? I did find a Mobile One racing non-synthetic oil in high viscosity only but I like my synthetics.
  6. Exact Rototilling

    Exact Rototilling LawnSite Fanatic
    Messages: 5,377

    Walmart has Mobil 1 20w-50 and 10-40 for only $9.95 a quart.

    STP oil treatment has zddp in it but it is frankly too thick and bumps up the viscosity.

    I still have an old.stash of CI4 rated shell rotela 5w-40 I'm working on before they made it environmentally friendly.

    Might be worth following the new and used oil analysis threads on bobistheoilguy.com for what is the best. I have not followed it much in the last 2 years.
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  7. jetta

    jetta LawnSite Member
    Messages: 223

    if you use synthetic oil you dont need to add zinc...if you dont, then use a diesel grade 1030 like shell tripple t it also has zddp in it at full levels...so does kohler 1030 oil
  8. MOturkey

    MOturkey LawnSite Silver Member
    Messages: 2,777

    Last I bought, I could buy Mobil 1 in 10-40 for around $26 for the 5 quart at Walmart.
  9. Valk

    Valk LawnSite Silver Member
    Messages: 2,711

    Have read many a time that Mobil 1 15w/50 is one of the better formulations. That's all I use in my KAW KAIs. Changed out every 75 hours with a new oil filter as well.

    I'm a believer that a mower engine needs 50-100 hrs of break-in on conventional motor oil before transitioning to synthetic.

    More importantly is to make DARN sure that the initial break-in oil is changed AFTER the first 8 hrs of operation = CRITICAL.
  10. mtmower

    mtmower LawnSite Bronze Member
    Messages: 1,111

    I was under the impression that the zinc was even removed from the synthetics. Supposedly they pulled it to keep catalytic convertors from going south so soon.

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